package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.LOGIN_USER_TTL;

@Slf4j
public class RefreshTokenInterceptor implements HandlerInterceptor {

    private final StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate=stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //通过拦截器判断是否登录
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token)){
            return true;
        }
        //根据token取集合
        String key=token+RedisConstants.LOGIN_USER_KEY;
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(key);

        if (userMap.isEmpty()){
            return true;
        }
        //将map集合转为UserDto对象
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        UserHolder.saveUser(userDTO);//存到Threadlocal中
        //刷新token有效期
        stringRedisTemplate.expire(key,LOGIN_USER_TTL, TimeUnit.MINUTES);
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
       UserHolder.removeUser();
    }
}
